P9 or P-9 may refer to: *

Planet Nine Planet Nine is a hypothetical planet in the outer region of the Solar System. Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs), bodies beyond Neptune that orb ...

, a hypothetical new planet in the far outer solar system *

Boeing XP-9 The Boeing XP-9 (company Model 96) was the first monoplane fighter aircraft produced by the United States aircraft manufacturing company Boeing. It incorporated sophisticated structural refinements that were influential in later Boeing designs ...

, a prototype fighter aircraft from the 1930s *

Heckler & Koch P9 The HK P9 is a semi-automatic pistol from Heckler & Koch in 9×19mm Parabellum, .45 ACP, and 7.65×21mm Parabellum and the first to use a variation of H&K's roller delayed blowback system in a pistol format and polygonal rifling now common ...

, a semi-automatic pistol * Springfield Armory P9, a semi-automatic pistol *

Peruvian Airlines Peruvian Air Line S.A. was a Peruvian airline based in Lima. The airline offered primarily domestic flights out of its main base at Jorge Chávez International Airport. On October 2, 2019, the airline ceased all operations due to liquidity issu ...

IATA airline designator * P9 (band), a Brazilian boyband * Power Nine, a trading cards game of ''Magic: The Gathering'' *

Psyclon Nine Psyclon Nine is an American band formed in 2000 in San Francisco, CA, known for their unique blend of electronic, industrial metal. Originally, Psyclon Nine's music was Terror EBM with melancholic atmospheres and black metal style vocals. Howe ...

, an aggrotech band *

P-9 Project The P-9 Project was the codename given during World War II to the Manhattan Project's heavy water production program. The Cominco operation at Trail, British Columbia, was upgraded to produce heavy water. DuPont built three plants in the Unite ...

See also